Mouthpiece for speaking-tubes.



No. 729,853. PATENTED JUNE 2, 1903. J. FINCK & H. HERBSTRITT. MOUTHPIEGEFOR SPEAKING TUBES.

APPLICATION FILED JULY 7. 1902.

2 SHEETS-SHEET 1.

10 MODEL.

v m W W n 1 PATENTED JUNE 2, 19.03.

J. FINGK & H. HERBSTRITT. I MOUTHPIEGE FOR SPEAKING TUBES.

urmcurou FILED JULY 7. 1902.

2 SHEETSSHBET 2.

K0 MODEL.

UNITED STATES Patented J line 2, 1903.

PATENT OFFICE.

JULIUS FINCK AND HERMANN HERBSTRITT, OF SAN FRANCISCO, CALIFOR- NIA,ASSIGNORS TO WILL dz FINCK COMPANY, OF SAN FRANCISCO, CALIFORNIA, ACORPORATION OF CALIFORNIA.

SPEAKING-TUBES.

SPECIFICATION forming part of Letters Patent No. 729,853, dated June 2,1903.

Application filed July 7, 1902.

To (tZZ whom, it may concern.-

Be it known that we, JULIUS FINOK and HERMANN IIERBSTRITT, citizens ofthe United States, residing in the city and county of San Francisco,State of California, have invented an Improvement in Automatic ElectricWindproof Mouthpieces; and we hereby declare the following to be a full,clear, and exact description of the same.

Our invention relates to improvements in call-annunciators in which bothavisible and audible signal is given. Its object is to provide a devicein which a semaphore will be operated, a whistle blown, and an electricbell rung by the action in the tube, of the'breath of the person givingthe call and in which device wind and drafts will be prevented frompassing through the tube to operate the signals accidentally, as sofrequently happens in factories and large buildings to cause annoyancein answering false alarms.

The invention consists, essentially, of cutoff Valves interposed in themouthpieces, hand-operated means by which the valves may be opened, aswhen it is desired to.talk into the tube, connections between each ofsaid valves, and a semaphore, and also electrioal connections by whichan indicator and bell are operated when the tube is blown into, 30thereby giving continuous notice to the eye and car until the call isanswered.

' It comprises details which will be more fully set forth hereinafter,having reference to the accompanying drawings, in which- Figure 1 is aview of mouthpiece A. Fig. 2 is a View of mouthpiece B at the other endof tube. Fig. 3 is a view with housing removed. Fig. 4: is across-section of mouthpiece. Fig. 5 is a section of housing.

A and B represent two mouthpieces located at separated points andconnectedbythe usual air-tube 2. Each mouthpiece contains a flap orvalve 3, actuated by a spring A on the shaft 5, on which the valve ishung in the air-passage. The rearward movement of the flap is limited bya stop 6, and when the flap rests against the stop, as it normally does,it is impossible to talk through the tube or Serial ITO-114,660. (N0model.)

blow therethrough from the speaking end of its respective mouthpiece. Awhistle and receiving-tube 7 may be attached to each mouthpiece betweenthe speaking end of the piece and its flap 3. A rearwardly-inclined'baffle 8 diverts sufficient air into the receiving-tube to blow thewhistle.

The flaps 3 may be operated in two ways and for two different purposes.When it is desired to talk from A to B, for instance, the flap in A islifted by means of a spring-actuated key 9, and the flap in B is thenlifted by blowing through A, which causesa colored semaphore orindicator 10 to appear at window 11 in thehousing 12. The key 9 issupported in the housing 12 in line with shaft 5. The inner end of thekey-shaft carries a segment 13, on which is a pin projection 14. Theshaft 5 has a plate 15 fixed to it, and a weighted arm-plate 16 ispivoted at 17 to the plate 15 eccentric to shaft 5. The arm-plate has aslot 18, in which a pin 19, fixed in plate 15, is movable. The arm 16 ofplate 16 carries two pins 20 21. The first is adapted to engage a cam 22on the shaft 23 to raise the semaphore 10 when the flap 3 in B, forexample, is operated by blowing through A. The pin 21, on the otherhand, engages a projection 24 on cam 22 to throw down the semaphore whenthe operator turns the key of B to open the flap, which is done by thepin 14 on segment 13 striking the lower side of the weight-arm, causingthe latter to turn on its pivot 17 till the rear wall of slot 18 strikespin 19 on plate 15, after which the continued movement of the key causesthe shaft 5 to turn in unison with the key. Thus it is seen that the arcof movement of the pins 2021 is different when the flap is lifted bymerely blowing through the tube than when the key is actuated to liftthe flap, so that while the flap in the first instance throws thesemaphore from a horizontal into a vertical position and displays asignal the act of the operator in answering the call throws theindicator from a vertical to a horizontal position again in readinessfor a subsequent call from the same source. A spring 25, having one endsecured to an eccentric 26 on the indicatorshaft 23, tends to hold theindicator or semaphore in a vertical or horizontal position. When in thelatter position, it rests on a stop 27 out of contact with the metalplate 28, which is insulated from the mouthpiece-casing. The plate 28forms one pole of an electric circuit and the semaphore the other, andconnection is had between these poles and the binding-posts 29, whenceWires run to a conveniently-situated bell, so that when the semaphore islifted into a vertical position a projection 30 on shaft 23 will contactwith plate 28, completing the circuit and ringing the bell continuouslyuntil the key 9 of the mouthpiece displaying the signal is turned tothrow down the semaphore and break the connection.

Having thus described our invention, what We claim, and desire to secureby Letters Patent, is-

1. The combination in a speaking-tube, of a hinged plate in theair-passage, a semaphore, means including a rock-shaft carrying thesemaphore and connections between the hinged plate and rock-shaftwhereby thelatter may be operated in opposite directions, and meanswhereby a continuous audible signal may be given simultaneously with themovement of the semaphore in one direction, said signal being brokenwhen the semaphore is moved in another direction.

2. The combination in a speaking-tube, of a plate hinged in theair-passage, a semaphore, means including a rock-shaft carrying thesemaphore and connections between the hinged plate and rockshaft wherebythe latter may be operated in opposite directions, and means whereby acontinuous audible signal may be given simultaneously with the displayof the semaphore and movement of the rock-shaft in one direction,whereby both visible and audible signals are given at the same time, andmeans whereby both signals are automatically discontinued by lifting thehinged plate in the act of answering the call.

3. The combination in a speaking-tube, of a plate hinged in theair-passage, a semaphore adapted to be displayed when air-currents passthrough said passage to actuate the plate, and means including arock-shaft carrying the semaphore and provided with a projection, and adevice movable with the hinged plate and adapted to engage saidprojection whereby the semaphore-signal is discontinued by a subsequentmanual actuation of the plate.

4. The combination in a speaking-tube, of a hinged plate in theair-passage, an indicator mounted on a rock-shaft, connections includinga member on the rock-shaft and a contacting member movable with thehinged plate whereby the rock-shaft may be operated to display theindicator on the movement of the plate, connections between saidindicator and electrically-sounded apparatus, and means whereby saidelectrical connections may be made and broken simultaneously with thedisplay and discontinuance of the indicator-signal.

5. The combination in a speaking-tube, of a spring-actuated plate hingedin the air-passage, a tiltable indicator,connections between saidindicator and plate, and includipga rockshaft having a cam and a membermovable with the plate and adapted to engage said cam to move therock-shaft in one direction, connections between said indicator andelectrically-sounded apparatus, said connections including a projectionon said indicator, and a spring-plate with which said projection isadapted to engage when the indicator is tilted to give a signal, andhand-operated key mechanism by which said signal may be discontinned.

6. The combination in aspeaking-tube, of a spring-actuated flap-valveinterposed in the air-passage, stop means by which its movement in onedirection is limited, an air-outlet intermediate of said valve and thespeaking end of the tube, a baffle by which a portion of the airisdiverted into said air-outlet, and signal devices operatable by themovements of said valve.

7. The combination in a speaking-tube of a hinged plate in theair-passage, operative means connecting said plate and a signalmechanisimsaid means including a plate fixed on the pivot-pin of thehinge of said plate, a weight-arm pivoted to said fixed plate and havinga limited movement about its pivot.

8. The combination in a speaking-tube, ofa hinged plate in theair-passage, a rock-shaft,- a cam on said shaft, a projection on saidcam, and means upon the hinge-plate engaging said cam and projection torock said shaft in opposite directions.

9., The combination in a speaking-tube, of a plate hinged in theair-passage, a rock-shaft, an indicator thereon, a weight-arm pivotedeccentric to the pivot-pin of the aforesaid plate and movable in unisonthereon, and connections between said weight-arm and the indicator-shaftwhereby the latter may be rotated in either direction.

10. The combination in a speaking-tube of a plate hinged in theair-passage, a Weightarm pivoted eccentric to the shaft of said plate,and movable in unison therewith, said weight-arm having a limitedmovement independent of said plate, connections between said arm andsignaling means and means for operating said arm.

11. The combination in a speaking-tube of a plate hinged in theair-passage, a weightarm pivoted eccentric to the shaft of said plateand movable in unison therewith, signal devices operable by themovements of said arm, and an independent key mechanism by which saidarm may be engaged and moved.

12. The combination in a speaking-tube of a plate hinged in theair-passage, a pivoted weight-arm movable in unison with said plate andalso having a limited movement independent thereof, signal devicesoperable by the movement of said arm, a housing for said devices andsaid arm and a spring-pressed key mechanism journaled in said housing bywhich said arm may be actuated.

In witness whereof We have hereunto set our hands.

JULIUS FINOK. HERMANN I-IERBSTRITT. Witnesses:

J. M. ,ELLIs, S. THOR.

